Cyclosa fuliginata is a species of orb-weaving spider commonly known as the sooty orb-weaver. It is found in North America, particularly in the eastern and central regions. This spider is known for its unique web-building behavior, as it incorporates debris and detritus into its web, giving it a messy appearance. The female spiders are larger than the males and display a dark brown or black coloration, blending in with their surroundings.